ML17256A831

Submits Preliminary Evaluation of Capability of Safety & Relief Valves to Operate Under Expected Operating & Accident Conditions,Per NUREG-0578 & NUREG-0737,Item II.D.1. Evaluation Based on EPRI Valve Test Program Results

ML17256A831
Person / Time
Site:	Ginna
Issue date:	04/15/1982
From:	MAIER J E ROCHESTER GAS & ELECTRIC CORP.
To:	CRUTCHFIELD D Office of Nuclear Reactor Regulation
References
RTR-NUREG-0578, RTR-NUREG-0737, RTR-NUREG-578, RTR-NUREG-737, TASK-2.D.1, TASK-TM NUDOCS 8204230351
Download: ML17256A831 (8)

Text

REGULATORY ORNATIONDISVRISUTION SYl(RIDE)'AOCESSION NBR:8204230351, DOC.DATE:

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~89EASTAVENUE,ROCHESTER, N.Y.I4649JOHNEMAILERvitePresident TCI.CttHONC

• tie*cooc7io546-2700April15,1982DirectorofNuclearReactorRegulation Attention:

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Subject:

PWRSafetyandReliefValveTestProgramR.E.GinnaNuclearPowerPlantDocketNo.50-244

DearMr.Crutchfield:

Inaccordance withtheinitialrecommendation ofNUREG0578,Section2.1.2aslaterclarified byNUREG0737,ItemII.D.landrevisedSeptember 29,1981,eachPressurized WaterReactor(PWR)UtilityonorbeforeApril1,1982wastosubmitinformation relativetothepressurizer safetyandreliefvalvesinuseattheirplant.Specifically thissubmittal shouldincludeapreliminary evaluation supported bytestresultswhichdemonstrates thecapability ofthereliefandsafetyvalvestooperateunderexpectedoperating andaccidentconditions.

Thisletterreferences reportsprovidedtoyoubythePWRSafetyandReliefValveTestProgramSubcommittee andprovidesadditional information applicable totheGinnaPlant.Rochester GasandElectricCorporation hasactivelypursuedresolution ofthisissuethroughdirect.participation intheElectricPowerResearchInstitute (EPRI)valvetestprogram.Theprimaryobjective oftheTestProgramwastoprovidefullscaletestdataconfirming thefunctionability oftheprimarysystempoweroperatedreliefvalvesandsafetyvalvesforexpectedoperating andaccidentconditions.

Thesecondobjective oftheprogramwastoobtainsufficient pipingthermalhydraulic loaddatatopermitconfirmation ofmodelswhichmaybeutilizedforplantuniqueanalysisofsafetyandreliefvalvedischarge pipingsystems.Reliefvalvetestswerecompleted inAugust1981,.andsafetyvalvetestswerecompleted inDecember1981.ThereportspreparedfortheEPRITestProgramandreferenced inthissubmittal included:

'hh<q~]PQIJ<</p<<"/lyhfIfrrIfhf,4 ROCHESTER GASANDELRICCORP-DATEApril15,1982TOMr.DennisM.Crutchfield HEETNO.2(1)"ValveSelection/Justification Reort",December1981Thisreportdocuments thattheselectedtestvalvesrepresent allparticipating PWRsafetyandreliefvalves.(2)"TestCondition Justification Reort",Aril1982andthe(3)"ValveInletFluidConditions'or'ressurizer SafetandRelief'Valves xnWestinhouseDesinedPlants",Februar1982Thesereportsdocumentthebasisandjustification ofthevalvetestconditions forallparticipating PWRplants.(4)"SafetandReliefValveTestReort",Aril1982Thisreportprovidesevidencedemonstrating thefunctionability oftheselectedtestvalvesundertheselectedtestconditions forallparticipating PWRplants.Allofthesedocuments havebeenreceivedbyRochester GasandElectricCorporation.

Additionally, theyhavebeentrans-mittedtoyouonbehalfoftheparticipating PWRUtilities fromDavidHoffmanofConsumers PowerCompany,ChairmanofthePWRSafetyandReliefValveTestProgramSubcommittee inaletterdatedApril1,1982.Rochester GasandElectricCorporation hasundertaken reviewofthesedocuments butthereview,atpresent,ispreliminary duetothepreliminary natureofthetestdatareceivedtodate.PowerOperated-Relief'alve (PORV)ThePORVsatGinnaare:Manufacturer

-CopesVulcanModelNo.-Globe,D-100-160 SizeSDescription

-3"NPS,316w/Stellite Plugand17-4PHCageQuantity-,2tr,ThesevalveshavebeentestedbyEPRIinatestconfiguration similartothatoftheactualpressurizer configuration attheplant.Thefluidconditions forthePORV's,whilenotspecifically addressed intheGinnaSafetyAnalysisReport,wereidentified byWestinghouse andarediscussed intheFluidConditions Justifica-tionReport,EPRIReport(3).Thefluidconditions forthetestswereselectedonthebasisofenveloping thosefluidconditions forallplantsutilizing thesamevalvetype.Testswereperformed bothattheMarshallSteamStationandattheWyletestfacility(PhaseIII).Atotalof20testswereconducted utilizing steam,water,andsteam-to-water transition fluidconditions.

Thesetestsconfirmed thatthevalveopened 8',+~ll'"/)trtP 4ROCHESTER GASANDELRICCORP.DATEApril15,1982TOMr.DennisM.Crutchfield HEETNO.3H.andclosedondemandandthatthevalvesufferednodamagethat,wouldprecludefutureoperations Specificinformation relatedtothesetestsisgiveninSection4.6ofthe"SafetyandReliefValveTestReport",EPRIReport(4)~SafetValvesThesafetyvalvesatGinnaare-.Manufacturer

-CrosbyValveandGageModelNo.-HB-BP-86Size-4K26AssemblyNo.-51249Quantity-2ThesevalveshavenotbeentestedbyEPRI.Howeversafetyvalvessimilarindesignandoperation havebeentestedinatestconfiguration similartothatoftheactualpressurizer configuration attheplant.Justification thatthevalvestestedenvelopethosevalvesatGinnaisgivenintheValveJustification Report,EPRIReport(1).Justification thatthefluidconditions forthetestsenvelopetheactualplantconditions ispresented inEPRIReport(3).Thesafetyvalveshavebeenshowntoopenandclose.Certainareasofsystemperformance arestillundergoing review,specifically addressing theinletpiping,outletpipingandthevalves.TheRochester GasandElectricCorporation isactivelyinvolvedwiththeWestinghouse OwnersGroupprogramandhasadditionally contracted Westinghouse toevaluatethespecificGinnasystem,including downstream piping.AllrelevantEPRIresultswillbeemployedintheevaluation.

Clarification ofconcernsandtheirimpactonplantperformance isexpectedpriortotheJuly1,1982information submittal date.Ourpreliminary evaluation oftheEPRIworkisthatthevalvestestedrepresent theGinnasafetyandreliefvalvedesignsandthattheconditions testedenvelopetherangeofexpectedoperating andaccidentconditions fortheGinnaPlant-TheEPRIreportsprovidetheevidencerequiredbyNUREG0737,ItemII.D.l.Awhichwillbeusedtoperformthefinalplantspecificevaluations.

TheSeptember 29,1981USNRCletterrequested thatplantspecificfinalevaluations besubmitted byJuly1,1982'nordertomeetthatdate,evaluations havebeeninitiated.

Depending ontheoutcomeoftheevaluations itmaybenecessary tocontinuetheevaluation beyondJuly1,1982-Ifalongerevaluation periodisrequired, youwillbenotified.

Verytrulyyours,~/u+.~~JohnE.Maier glI@IIr,~qr~rw,l'qgIII'I